Grinding-mill.



G. S. EMERICK.

GRINDING MILL.

APPLICATION FILED JULYIO, 1914.

Patented Feb. 22, 1916.

GEORGE S. EMERICK, OF PHILADELPHIA, PENNSYLVANIA.

GRINDING-MILL.

Specification of Letters Patent.

Patented Feb. 22, 1916.

Application filed July 10, 1914. Serial No. 850,092.

T 0 all whom it may concern Be it known that I, GEORGE S. EMERIGK, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Grinding-Mills, of which the following is a specification.

My invention relates to improvements in grinding or pulverizing mills wherein are employed a grinding ring and a set of grinding balls within the ring and a driving member provided with projecting arms between which the balls are located and by means of which the balls may be actuated.

The object of my invention is to provide the arms of the driving member with driving blocks of novel construction adapted to engage the balls, during the operation of the machine, and having provision whereby the blocks may be removed from the driving member and replaced or new blocks substi tuted therefor to compensate for wear, without the removal of the heavy grinding balls from the machine, and at the same time preserve the strength and size of the driving blocks and their carrying arms and not increase the distance between adjacent arms or decrease the size of the grinding balls.

My invented machine consists of the elements and the combinations of them hereinafter fully described and particularly claimed.

In the accompanving drawings, illustrating my invention: Figure 1, is a view partly in plan and partly in horizontal section, showing the grinding mechanism of one-half of a grinding mill embodying my invention, Fig. 2, is a vertical section thereof, on line 22 of Fig. 1. Fig. 3, is a perspective view of one of the driving blocks and its retaining pin removed from the machine. Fig. 4:, is a perspective view of the driving block removed from its retaining pin. Fig. 5, is a perspective view of the retaining pin.

Referring to the drawings, 3 designates the frame of the machine and 4 the grinding ring supported thereby and surrounding the centrally arranged driving shaft 5. Within the grinding ring 4 and secured to the shaft 5 is a driving member 6 provided with radially projecting arms 7, and between the arms 7 and within the ring 4 are the grind ing balls 8, as clearly shown in Fig. 1. Each arm 7 carries a driving block 9 adapted to engage a ball 8 and drive it around the interior of the ring 4 when the driving member 6 is rotated in the direction of the arrow in Fig. 1.

r The following description of one block 9 and its relation to its ball 8 and arm 7 will suffice for all: The block 9 is located rearwardly of the ball 8 which it drives and between the ball 8 and the forward face of the arm 7 against which the block bears. The block 9 has a rearwardly extending boss 10 formed thereon which is smaller in diameter than the body of the block and which is located within and fitted to a socket 11 in the arm 7. Extending rearwardly from the block 9 and through the arm 7 and beyond the rearward face thereof is a retaining pin 12 for the block 9. The pin 12 is smaller in diameter than the boss 10 and has a transversely extending head 13 formed on the forward end thereof. The head 13 is shaped to a similarly shaped slot 14 which extends transversely through the boss 10. The rearward end of the pin 12 is provided with a transverse hole to receive a removable cotter pin 15 which engages the rearward face of the arm 7 and serves as a suitable means to prevent forward movement of the pin 12 relatively to the arm 7.

When the parts are assembled, as shown in Figs. 1 and 2, the cotter pin 15 prevents forward movement of the pin 12 relatively to the arm 7, the dove-tail head 13 embraced by the boss 10 prevents forward movement of the block 9 relatively to the pin 12 and the arm 7 or wall of the socket 11 therein prevents movement of the driving block 9 transversely of the pin 12. and thus the parts are held in working relation. When it is desired to remove the driving block 9 and substitute another therefor, the cotter pin 15 is removed. the ball 8 is rolled forwardly from the block9 a sufiicient distance to permit the block 9 and its retaining pin 12 to be moved forwardlv relatively to the arm 7 until the rearward face of the boss 10 is in the same plane with or forwardly of the forward face of the arm 7. The driving block 9 is then removed from the retaining pin 12 by moving the block 9 transversely of the pin 12 and sliding the boss 11 off of the head 13. The new driving block is then applied to the pin 12 by sliding the boss of the block on to the dovetail head 13, then moving the block and pin rearwardly to seat the boss 10 and head 13 within the socket 11 and then applying the cotter pin 15 to hold the parts in place.

I claim:

1. In a grinding mill the combination of aframe, a grinding ring, a grinding ball within said ring, a driving member having an arm rearwardly of said ball, a driving block rearwardly of said ball and having a rearwardly extending boss located within a socket in said arm, a pin extending rearwardly from said block and through said arm and having means on the forward end thereof cooperating with said boss and preventing the removal of said boss from said socket, and means to prevent forward movement of said pin relatively to said arm.

2. In a grinding mill the combination of a frame, a grinding ring, a grinding ball within said ring, a driving member having an arm rearwardly of said ball, a driving block rearwardly of said ball and having a rearwardly extending boss located within a socket in said arm, a pin extending rearwardly from said block and through said arm, a head on the forward end of said pin and cooperating with said boss to prevent forward movement of said block relatively to said pin, said boss being removable from said head transversely to said pin when said boss is outside of said socket, and the wall of said socket preventing such movement of said boss when it is within said socket, and means operative to prevent forward movement of said pin relatively to said arm.

3. In a grinding mill the combination of a frame, a grinding ring, a grinding'ball within said ring, a driving member having an arm rearwardly of said ball, a driving block rearwardly of said ball and having a rearwardly extending boss located within a socket in said arm, a pin extending rearwardly from said block and through said arm, a transversely-extending dove-tail head on the forward end of said pin, said head being fitted within a slot extending transversely through said boss, said boss being removable from said head transversely to said pin when said boss is outside of said socket, and the wall of said socket preventing siich movement of said boss when it is within said socket, and means adjustable to prevent forward movement of said pin relatively to said arm.

4. A driving block for grinding mills, having a driving face adapted to engage a grinding ball and having a removable stem adapted to be secured within a driving member.

5. A driving block for grinding mills, having a driving face adapted to engage a grinding ball and having a stem removable from the block at right angles to the axis'of the stem and adapted to be secured within a driving member.

In testimony whereof I affix my signature in presence of two witnesses.

. GEORGE S. EMERICK. Witnesses a A. V. Gnoorn, S. I. HARPER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington. D. G. 

